Well, I really hope I'm not sounding like too much of a pessimist, but I'm not sure this show could have been anything other than a mellowdrama under Weismans's direction. For me, it's just so painfully obvious that Greg never put any heart or soul into this show. I'm not saying Weisman's a bad person, because he really is a great guy. What I am saying, is that Weisman was a completely wrong choice for a director of Young Justice. The reason I'm saying this, is because of an interview Weisman had with the video game reviewer, Angry Joe (Joe Vargas). During that interview, which was about the game Young Justice Legacy, Weisman and his partner director Brandon Vietti openly admitted that not only were they scared of directing YJ, but that they didn't even want to take on the project in the first place. Again, I'm NOT trying to paint an "Everything in Young Justice is shit" picture, but when the directors themselves openly state that they didn't want to initially take on the job, there's obviously a LARGE problem at hand.
Another thing that turned me away from this show, was the statements I got when I met some of the voice actors at different conventions. When I met Nolan North at SacAnime 2013, he said that it was really fun voicing Superboy, but he felt a little uncomfortable with the work environment Weisman had created. Again, not saying Weisman's a bad person, but it can't be denied, that when a boss has no passion for their job, that dispassion will filter down to their staff, and when that happens, the quality of their work degrades. It just seems like the management of YJ was never held accountable for anything, and because of this, the show was taken in every direction at once, with no overwhelming context to guide it in the best direction.
If I were to make a comparison between YJ and something, that something would be, New Coke. Now if you don't know what New Coke is, that's ok, and I'll explain. In the 1980's, CocaCola decided to remake Original Coke into a new flavor. New Coke was hyped to all HELL before it was released, however when it finally came out, people detested it so much that the company had to pull the product as fast as they could to save their revenue. So how is this like Young Justice? Well, much like New Coke, YJ was hyped to the hilt, and when the whole fiasco was over, it just left a bad taste in peoples mouths.
For what it's worth, Young Justice truly did have potential, and it still does. It's just that the potential it has never truly resided in the show itself. To restate what I said in my previous comment, the potential resides in us. When we write fanfics, we shouldn't ever restrict ourselves because of what happened in the show. Instead of rehashing already existing storyline's, we should make up our own. We should invent our own characters, both heros and villains, after all, Weisman did just that when he invented Kaldur'ahm. If your preferred ship didn't happen in the show, make it happen in a fanfic. Just because Weisman says something is cannon doesn't mean that what we say is cannon has any less validity. My advice, would be to ignore everything Weisman says about YJ, and invent your own cannon, because at the end of the day, all the characters in YJ are imaginary, and if something is imaginary, then it can be whatever anyone wants it to be. No one person can put limits on what is imaginary, not even Greg Weisman (personally, I think Weisman has forgotten that).
P.S. I have a few head cannon YJ crack-parrings/ships of my own if you'd like to hear them.